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R <br /> SAMPLING PROCEDURES <br /> Sampling Procedures <br /> i <br /> Soil and groundwater sampling will be conducted to provide data <br /> to evaluate the extent of chemicals ia the soils and groundwater <br /> at the Site. Soil and groundwater sa ples will be used for <br /> chemical analysis . The methodology used for this sampling <br /> purpose is discussed in the following sections . <br /> Soil Sampling <br /> Soil may be collected for chemical analysis by directly driving <br /> precleaned brass or stainless steel tubes into the soil to assess <br /> surface/subsurface level conditions . The samples must completely ; <br /> fill the tubes to minimize headspace and consequent loss of <br /> volatile contaminants, if present. These tubes shall be lined <br /> with aluminum foil or Teflon, capped with air-tight plastic lids, <br /> and taped around the caps to prevent possible moisture and <br /> chemical loss . Disturbed soil samples will be collected in 250- <br /> ml jars with taped, airtight lids . Each jar will be completely <br /> filled with soil to minimize headspace and consequent loss of <br /> volatile contaminants, if present _ <br /> After being scaled and labeled, soil samples will be maintained <br /> at a temperature of 4°C or lower usin blue ice during delivery <br /> to the laboratory and prior to analysis by the laboratory. <br /> Samples will be analyzed at the laboratory within specific <br /> holding times . ; <br /> Groundwater Sampling <br /> I <br /> The monitoring well at the Site will be developed a minimum of 72 <br /> hours following well installation. The monitoring well will be <br /> developed by hand-bailing to remove fine particles near the well <br /> screen to improve hydraulic communication with the surrounding <br /> F. formation. Parameters such as water clarity, pH, temperature, <br /> specific conductance and volume extracted will be measured during <br /> the development process to gauge its progress . observations <br /> regarding odor and possible oily sheens will also be noted_ When <br /> the parameters stabilize, the well will be considered developed. <br /> Groundwater sampling activities will be performed a minimum of 72 <br /> hours following development of the well . Groundwater sampling <br /> will involve bailing approximately four to ten well casing <br /> volumes of water out of the well prior to sampling. The <br /> parameters listed above will be measured during purging. In <br /> cases of slowly-recovering wells , the well will be pumped or <br /> A--1 <br />